<!DOCTYPE html>
<html >
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>注释</title>
</head>
<body>
    
</body>
<script>
   
    var a=22;
    var b=33;
    var c=a+b; //计算a与b的和
  
</script>
</html>